Package org.apache.hadoop.metrics2

Interface MetricsSource

All Known Implementing Classes:

DecayRpcScheduler, DecayRpcScheduler.MetricsProxy, JvmMetrics, MetricsSystemImpl, WeakRefMetricsSource

@Public
@Evolving
public interface MetricsSource

The source of metrics information. It generates and updates metrics. It registers with MetricsSystem, which periodically polls it to collect MetricsRecord and passes it to MetricsSink.

Method Summary

Modifier and Type	Method	Description
void	getMetrics(MetricsCollector collector, boolean all)	Get metrics from the metrics source

Method Detail

getMetrics

void getMetrics(MetricsCollector collector,
                boolean all)

Get metrics from the metrics source

Parameters:

collector - to contain the resulting metrics snapshot

all - if true, return all metrics even if unchanged.